There is disclosed a device and method for fabricating such a device. The device includes cavities formed in a substrate. A laminated membrane is mounted to the substrate and spans the cavities. The laminated membrane includes a layer of a flexible material, typically a polymer, and a layer of a two-dimensional material that is typically graphene.

A diaphragm is provided, including a dome and a suspension extending from a periphery of the dome. The dome includes a stack of an aluminum foil layer, a foam layer and a carbon fiber layer. The dome is recessed from the aluminum foil layer toward the carbon fiber layer to form a receiving recess. The receiving recess is arranged surrounding the periphery of the dome. The suspension is partially received in the receiving recess and is fixed to the dome. A sounding device is also provided, the sounding device includes the diaphragm. The diaphragm and the sounding device of the present disclosure have better high frequency acoustic performance and excellent reliability.

A MEMS microphone includes: a glass substrate including an opening portion; a membrane provided on the glass substrate so as to cover the opening portion and including a first conductive layer; and a backplate provided above the membrane via a cavity, including a plurality of through holes through which sound waves pass, and including a second conductive layer. The first conductive layer is made of a metal or a conductive oxide. The second conductive layer is made of a metal or a conductive oxide.

An acoustic sensor comprises a sensing head comprising an optical fiber having a tip. A graphene diaphragm is disposed on the tip and is configured to vibrate in response to an acoustic signal. A fiber laser is optically coupled to the sensing head. The fiber laser comprises a first set of fiber Bragg gratings and a second set of fiber Bragg gratings. A gap is present between the first set and the second set of fiber Bragg gratings. The fiber laser is configured to generate a sensing optical signal having a first intensity in response to an excitation optical signal, the sensing optical signal impinging on the graphene diaphragm such that a feedback optical signal is reflected from the graphene diaphragm towards the fiber laser and has and has a second intensity modulated by the vibration of the graphene diaphragm that corresponds to the acoustic signal.

A MEMS device and a method of manufacturing the same are provided. A semiconductor device includes a substrate and a membrane over the substrate. The membrane includes a piezoelectric material configured to generate charges in response to an acoustic wave. The membrane includes a via pattern having first lines that partition the membrane into slices such that the slices are separated from each other at a first region near an edge of the membrane and connected to each other at a second region.

A vibration plate having a reinforced structural element is provided. The vibration plate includes a vibration plate main body. The vibration main body has a first surface and a second surface opposite to each other. The reinforced structural element is located between the first surface and the second surface. A material of the vibration plate main body is different from a material of the reinforced structural element.

A vibration device includes: a glass diaphragm; an exciter which is fixed to the glass diaphragm and vibrates the glass diaphragm; an enclosing member which defines an internal space by enclosing a portion, including a fixing position of the exciter, of the glass diaphragm, one end portion of the glass diaphragm being exposed to outside the internal space through an opening of the internal space; and a shielding member for acoustic shielding between the opening and the glass diaphragm, the shielding member dividing the glass diaphragm into an excitation region located inside the internal space and a vibration region located outside the internal space.

A non-dispensing manufacturing process includes forming a paper cone; engaging the paper cone with a voice coil to form a vibration assembly; fixing a yoke, a magnet set, and a washer to form a magnetic circuit assembly; engaging a basket with the magnetic circuit assembly; and engaging the basket with the vibration assembly to form a speaker, where no glue is used in the manufacturing process. A speaker includes a paper cone; a voice coil engaged with the paper cone to form a vibration assembly, where a junction between a bobbin of the voice coil and the paper cone has a first welding layer; a magnetic circuit assembly including a yoke, a magnet set, and a washer that are integrally fixed; and a basket engaged with the magnetic circuit assembly and the vibration assembly.

A piezoelectric speaker-forming laminate (10) includes: a piezoelectric film (35); a pressure-sensitive adhesive face (17); an interposed layer (40) being a porous body layer and/or a resin layer disposed between the piezoelectric film (35) and the pressure-sensitive adhesive face (17); and a release layer (20) joined to the pressure-sensitive adhesive face (17). The pressure-sensitive adhesive face (17) is disposed in such a manner that at least a portion of the piezoelectric film (35) overlaps the pressure-sensitive adhesive face (17) when the piezoelectric film (35) is viewed in plan. The piezoelectric film (35) and the interposed layer (40) are allowed to be fixed to a support (80) as a piezoelectric speaker or a portion of a piezoelectric speaker by sticking the pressure-sensitive adhesive face (17) from which the release layer (20) has been removed to the support (80).

The present disclosure relates to a display apparatus, and more particularly, to a display apparatus having a display panel capable of generating sound. A display apparatus according to the present disclosure includes: a display module; a guide panel disposed at circumferences of a rear surface of the display module; a back cover attached to the guide panel; a sound generating unit disposed between the display module and the back cover; and an adhesive fixing element and a vibration absorber disposed between the guide panel and the rear surface of the display module, wherein the adhesive fixing element fasten the guide panel to the rear surface of the display module, and wherein the vibration absorber is disposed at the guide panel as facing to inner portions of the display module.